Sight Reading Factory is a cloud-based service that generates customizable sight reading exercises on demand. It offers multiple difficulty levels and unlimited exercises for piano, guitar, voice, strings, woodwinds, brass, and percussion. Students can practice in a web browser or iOS app, and educators can create assignments and use auto assessment.
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Sigma File Manager is a free, open-source file manager for Windows and Linux. Its features include a smart global search with typo correction, tabs, split view, and an extensions marketplace. It supports LAN file sharing with browser access and FTP, zip archives, and tags, and can replace File Explorer for most everyday actions on Windows.
An online American Sign Language dictionary offering signs for hundreds of words and phrases, demonstrated in video by Dr. Byron Bridges. Visitors can browse signs by category or use a beta sign search, and the site points to additional ASL courses and workbooks.
Sign Translate helps clean, compare, sort, transform, count, or format text in the browser.
Sign Learner is a free browser extension for learning sign language while browsing the internet. It highlights words on web pages at random, and hovering over a highlighted word shows the corresponding sign in either ASL or BSL. Signs are drawn from a bank of over 6000 signs, and the extension is available from the Chrome Web Store.
Silicon helps clean, compare, sort, transform, count, or format text in the browser.
SILVA is an online resource providing quality checked, aligned ribosomal RNA sequence datasets for small and large subunit rRNA across Bacteria, Archaea and Eukarya. It offers releases, ARB format files, search, browser, probe and primer tools, ACT alignment, and SILVAngs classification for NGS data.
SilverBench is a JavaScript-based CPU benchmark and stress test that runs in a browser. It offers Performance, Extreme and Stress modes and measures CPU performance on PCs and mobile devices using a photon-mapping rendering engine, with all tests running on the CPU only.
Simple Statistics is a JavaScript implementation of descriptive, regression, and inference statistics. It is written in literate JavaScript with no dependencies and is designed to work in all modern browsers and in Node.js. The repository is published under an ISC license.
SimpleLogin is an open source email aliasing service based in Switzerland. Users give an alias instead of their real address, and emails sent to the alias are forwarded to the inbox. Replies can be sent from the alias, keeping the real address hidden. Aliases can be managed on the website, browser extensions or Android.
Simplenote helps clean, compare, sort, transform, count, or format text in the browser.
SimplyScripts presents a browser-based catalogue of films, series, and episode pages.
Sine is an open source project with code, documentation, and setup resources for browser settings.
Sink It is a free browser extension that modifies the web versions of Reddit, YouTube, Twitter/X and Google search. For Reddit it adds comment navigation, adaptive dark mode and double-click upvoting, and removes app banners, buttons and ads. The YouTube and Twitter/X extensions are described as coming soon to the App Store.
SISSA Open Data is a repository of research datasets and code from SISSA. It hosts supplementary videos, replication data for publications, open access annual reports and experimental datasets. Records can be browsed by name or date, and users can add data or create a dataverse after logging in.
MAL-Sync is a browser extension that integrates MyAnimeList, AniList, Kitsu, Simkl, Shikimori, and Mangabaka into various sites, with automatic episode tracking. It lets users search, update, and manage their lists from the extension popup and shows Discord rich presence. It is available for Chrome, Firefox, Opera, and as a userscript.
Siyuan helps clean, compare, sort, transform, count, or format text in the browser.
Browse public datasets, metadata and downloadable records in an open catalog.
Sketchfab is a platform for publishing, sharing, and discovering 3D content on web, mobile, AR, and VR. It offers a universal 3D/VR viewer that works in all browsers and operating systems without a plugin, and uses compression to deliver models. Users can embed and share 3D models on websites, forums, and social media. The site also offers free 3D models under Creative Commons licenses.
SlidesAI is a web-based tool that turns text, notes, documents, PDFs and prompts into presentations. It works within Google Slides, PowerPoint, ChatGPT and a browser-based web app. The Basic plan costs $0/month and includes 12 presentations per year. The Pro plan costs $10.00/month billed at $120/year and adds document upload.
Browse movies and television series through Sling's web catalogue and viewing pages.
Slope Plus is a modded version of the game Slope with extra features and a smoother framerate, available to download or play in browser. It includes seeded runs and custom games with custom maps and a custom starting speed.
SmartUpscale is an extension for Firefox and Chrome that applies integer scaling to images on webpages, preventing blur on images whose displayed size is an integer multiple of their real size. It is aimed at high pixel density displays. The scale is calculated per image, and options and limitations are documented.
SmartImage is a reverse image search tool offered in a Windows GUI version and a cross-platform Rdx version. It queries supported image search engines including SauceNao, IQDB, Ascii2D, trace.moe, and Yandex. Users can input images via direct links, drag-and-drop, clipboard, system context menu, or command line. The tool opens the best matching results in the user's default web browser.